Use testcontainers for MongoDB samples.

...with some exceptions for samples that require a replica set.

See #632

mongodb/security/src/test/java/example/springdata/mongodb/security/PersonRepositoryIntegrationTest.java

@@ -27,6 +27,12 @@ import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+import org.testcontainers.utility.DockerImageName;
 
 /**
  * Integration test for {@link PersonRepository}.
@@ -34,9 +40,19 @@ import org.springframework.security.core.context.SecurityContextHolder;
  * @author Thomas Darimont
  * @author Oliver Gierke
  */
+@Testcontainers
 @SpringBootTest
 class PersonRepositoryIntegrationTest {
 
+	@Container //
+	private static MongoDBContainer mongoDBContainer = new MongoDBContainer(
+			DockerImageName.parse("mongo:5.0"));
+
+	@DynamicPropertySource
+	static void setProperties(DynamicPropertyRegistry registry) {
+		registry.add("spring.data.mongodb.uri", mongoDBContainer::getReplicaSetUrl);
+	}
+
 	@Autowired PersonRepository repository;
 
 	private Person dave, oliver, carter, admin;

mongodb/security/src/test/resources/application.properties

@@ -1,3 +0,0 @@
-# Random port for embedded MongoDB
-spring.data.mongodb.port=0
-spring.mongodb.embedded.version=3.6.0